SKU: 42320-4 | UPC: 807298008530
Manley 3/8 ARP 625+ Bolt (Set of 4) 1955-2002 Chevy Small Block Ford 289/302/351W
Manley 42320-4 provides four 3/8″-24 x 1.500″ ARP 625+ Inconel connecting rod bolts designed for Chevrolet small block 265-400 cid and Ford 289/302/351W engines. These bolts deliver 260000 psi tensile strength for reliable clamping under high boost and extreme RPM in racing or street performance engines. Engine builders choose them for consistent performance and long-term durability in demanding applications.
Key Features
- ARP 625+ Inconel Alloy: Provides 260000 psi tensile strength with superior fatigue and heat resistance for high horsepower builds
- Exact Dimensions: 3/8″-24 UNF thread 1.500″ underhead length 12-point head for accurate fit torquing and rod clearance
- Black Oxide Coating: Protects against corrosion and eliminates thread galling for smooth installation and extended service life
- Pack of 4: Perfect quantity for two connecting rods in rebuilds or upgrades
- USA Made: ARP precision manufacturing ensures uniform quality and reliability
Product Notes
- Use ARP Ultra-Torque lubricant on threads and under bolt heads for accurate torque readings
- Torque to rod manufacturer specs typically 55-65 ft-lbs
- Inspect connecting rods for correct big-end bore sizing prior to installation
Installation Notes
- Professional installation recommended.
- Clean all threads and surfaces thoroughly before assembly
- Compatible with H-beam and I-beam rods designed for 3/8″ ARP bolts
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1955-2002 | Chevrolet | Small Block V8 | 265-400 cid (Camaro Corvette Truck) |
| 1967-2002 | Chevrolet | Camaro | Base RS SS Z/28 |
| 1955-1991 | Chevrolet | Corvette | Base Stingray |
| 1963-1968 | Ford | 289 V8 | Mustang Falcon Fairlane |
| 1968-1995 | Ford | 302 V8 | Mustang F-100 F-150 Truck |
| 1969-1996 | Ford | 351W V8 | Mustang F-Series Bronco |
Why Choose Manley?
- Partners with ARP to supply fasteners proven in NHRA dragsters
- Offers strength trusted in high-horsepower engine projects
- Built to exact tolerances for seamless rod compatibility
Frequently Asked Questions
- Q: Do these fit Chevy 350 small block engines?
A: Yes fits all 1955-2002 Chevrolet small block 265-400 cid engines with 3/8″ rod bolts including Camaro Corvette trucks - Q: What material and strength do ARP 625+ bolts provide?
A: Inconel-based superalloy at 260000 psi tensile strength with high heat fatigue resistance - Q: Does this include a warranty?
A: Backed by ARP one-year unlimited mileage warranty against material workmanship defects
Shipping & Handling
- Method: UPS Ground USPS Priority Mail
- Availability: In stock – ships same or next business day
- Packaging: Compact protective box
- Weight: 0.25 lbs
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